// Copyright (c) 2024 Proton Technologies AG
//
// This file is part of Proton Mail.
//
// Proton Mail is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Proton Mail. If not, see https://www.gnu.org/licenses/.

import ProtonCoreCrypto

struct CryptoUtils {
    static func randomSessionKeyAndKeyPacket(publicKey: String) throws -> (SessionKey, String) {
        let sessionKeyBytes = try Crypto.random(byte: 32)
        let sessionKey = SessionKey(sessionKey: sessionKeyBytes, algo: .AES256)
        let keyPacket = try Encryptor.encryptSession(publicKey: .init(value: publicKey), sessionKey: sessionKey)
        return (sessionKey, keyPacket.value)
    }
}
